I want to know wether PB3D is free or should pay for it after is release?
The PB3D library and command line utility are free for download. It isn't clear whether there is going to be a final release of PB3D - please see the blog post for more information:
Will the final release of PB3D?
What is the current status of the project?
Can I somehow help the PB3D project?
And... may be open source?